名词短语
中文翻译：递减序列集合
同义词：
['declining sequence', 'decreasing sequence']
例句：
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1. The researchers found that the numberof species in the ecosystem was decreasing.
研究人员发现生态系统中物种的数量正在减少。
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2. Thecompany is implementing a new strategy to increaseits market share.
该公司正在实施一项新策略以增加市场份额。
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3. The decrease in temperatureled to a decrease in productivity.
温度的下降导致生产力的下降。